Struct CachedFileMetadata 

pub struct CachedFileMetadata {
    pub meta: ObjectMeta,
    pub schema_fingerprint: Arc<SchemaFingerprint>,
    pub statistics: Arc<Statistics>,
    pub ordering: Option<LexOrdering>,
}

Cached metadata for a file, including statistics and ordering.

This struct embeds the ObjectMeta used for cache validation, the file_schema fingerprint, cached statistics, and ordering information.

Fields

meta: ObjectMeta

File metadata used for cache validation (size, last_modified).

schema_fingerprint: Arc<SchemaFingerprint>

Fingerprint of the file_schema used to compute statistics.

statistics: Arc<Statistics>

Cached statistics for the file, if available.

ordering: Option<LexOrdering>

Cached ordering for the file.

Implementations

impl CachedFileMetadata

pub fn new( meta: ObjectMeta, schema_fingerprint: Arc<SchemaFingerprint>, statistics: Arc<Statistics>, ordering: Option<LexOrdering>, ) -> Self

Create a new cached file metadata entry.

pub fn is_valid_for( &self, current_meta: &ObjectMeta, current_schema_fingerprint: &Arc<SchemaFingerprint>, ) -> bool

Check if this cached entry is still valid for the given metadata.

Returns true if the file size, last modified time, and schema match.

Trait Implementations

impl CacheValue for CachedFileMetadata

fn size(&self) -> usize

Size of the value in bytes used for cache memory accounting.

impl Clone for CachedFileMetadata

fn clone(&self) -> CachedFileMetadata

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl DFHeapSize for CachedFileMetadata

fn heap_size(&self, ctx: &mut DFHeapSizeCtx) -> usize

Return the number of bytes this value has allocated on the heap, including heap memory owned transitively by nested values.

impl Debug for CachedFileMetadata

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for CachedFileMetadata

impl PartialEq for CachedFileMetadata

fn eq(&self, other: &CachedFileMetadata) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for CachedFileMetadata